How to live stream using OBS and HD

Open Broadcaster Software (OBS) is a free and open source software for video recording and live streaming. With OBS you can capture your cameras or devices using Epiphan capture cards or video grabber products then pull them all together in a easy and affordable way for your online audience. Use OBS to create professional-looking news, online gaming, internet shows, sporting events, concerts, church services, corporate meetings, lectures and more.


  • Any video source with VGA/DVI/HDMI™ output, in this example a secondary laptop
  • An Epiphan HD™ or other Epiphan video grabber
  • A capture computer pre-installed with OBS
  • A destination streaming service with an FMS URL (a server) and play path/stream key (if any – typically provided by your streaming service)

Step 1. Connecting the devices

Connect HD to your capture computer via USB 3.0 (or USB 2.0); connect your video source (in this case another laptop) to HD. Your computer will auto detect HD as a capture device (like a webcam). Ensure the indicator light under the base of HD is either a solid blue (for USB 3.0 connections) or a solid green (for USB 2.0 connections). See the Indicator light details section of the online user guide for more information.

live stream with obs diagram

Step 2. Open OBS

Open the OBS application. The blank interface looks like this:

OBS blank interface

Step 3. Add your HD as a source

OBS allows you to add an unlimited number of sources. To stream a source, each source must be added to a “Scene”, which is essentially a layout containing a selection of sources.

OBS comes with a default scene already created. You can rename your scene and create additional scenes by right-clicking the name of the scene to display its customization options.

OBS scene options

To add your HD as a source:
  1. With your desired scene selected, right-click the empty space in the Sources box and hover your cursor over the Add option to display a list of possible sources.

OBS add source

  1. Select Video Capture Device from the list of input sources and rename the source when prompted; the Device Selection window displays.

OBS device selection

  1. Click the Device dropdown box, select your HD video grabber from the list displayed, and press OK to return to the OBS main menu.

OBS HD device selection-AVioHD

  1. Your HD device is now displayed in the Sources box in the OBS main menu.

OBS device selection AVioHD added

Step 4. Set up your streaming destination

With OBS you can stream your content to your own custom RTMP server or you can use popular streaming services, such as YouTube or Twitch.

To set your streaming destination:

  1. Click the Settings button in the OBS main menu.

OBS settings button

  1. In the Settings window that opens, select Broadcast Settings from the list of categories on the left of the window.

OBS broadcast settings

  1. Ensure that the Mode field is set to Live Streaming and use the Streaming Service dropdown list to select your desired live streaming provider.

OBS streaming service

  1. Set the FMS URL (server) from the list of options provided in the FMS URL dropdown menu and enter the Play Path/Stream key (if you have one – usually given to you by your streaming service).

Note: If using a listed streaming service, use the FMS URL dropdown to select the server closest to you. If using a custom streaming service, type your server address into the FMS URL field instead (Streaming Service must first be set to Custom).

OBS set streaming

  1. Video encoding format, audio codecs, bitrates, resolution and frame rate settings are automatically set to default values by OBS.

Note: HD works right out of the box with default OBS live streaming settings, however if you’d like to tweak these settings, click on Encoding and Video on the left side of the Settings window to make any changes.

OBS encoding and video settings

  1. Press OK when finished to return to the OBS main menu.

Step 5. Start live streaming!

Once you have completing the configuration process, you’re now ready to start broadcasting and recording your live stream.

If you would like to see your stream before it goes live, click the Preview Stream button from the OBS main menu.

OBS stream preview

To start your live stream:

Click the Start Streaming button from the OBS main menu; your live stream displays in the center of the window.

OBS streaming live

Congratulations! You’re now live streaming with HD and OBS!